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Home Backend Development PHP Tutorial 读定txt文件的问题

读定txt文件的问题

Jun 23, 2016 pm 01:47 PM

一。请问怎么每次把内容写入txt文件的第一行。

二。请问怎么读取txt文件的最后一行。


回复讨论(解决方案)

一:

$handle  =  fopen ( 'a.txt' ,  'r+' );rewind($handle);fwrite($handle,"这是第一行\r\n");fclose ( $handle );
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二:

$handle  =  fopen ( 'a.txt' ,  'r+' );$arr=array();while($line=fgets($handle)){    $arr[]=$line;}fclose ( $handle );echo end($arr);
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一。那个写入txt第一行把txt文件原来的内容都清除了,我是想保留原来的内容,新内容插入到第一行。

$str="这是第一行\r\n";  $handle  =  fopen ( 'a.txt' ,  'r+' );   while($line=fgets($handle)){    $str.=$line;   }   fclose($handle);   file_put_contents('a.txt',$str);
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看来没有直接功能去实现,只能循环取出数据了,谢谢啦

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